1、 SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising theref
2、rom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2006 SAE International All rights reserved. No part of this publication ma
3、y be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA)
4、Fax: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS: http:/www.sae.org AMS 2451/7A AEROSPACE MATERIAL SPECIFICATION Issued AUG 2000 Revised MAY 2006 Superseding AMS 2451/7 Plating, Brush, Nickel Low Stress, Medium-Hardness Deposit RATIONALE AMS 2451/7A is a Five Year Review and update of this sp
5、ecification. 1. SCOPE 1.1 Purpose This specification covers the requirements for brush plating of medium-hardness, low stress nickel by electrodeposition. 1.2 Application This process has been used typically to improve wear resistance, to repair medium-hardness, low stress nickel electrodeposits and
6、 to repair damaged, worn, or mismachined parts in applications requiring hardness, fatigue resistance of parts with service temperatures up to 450 F (232 C), but usage is not limited to such applications. 1.3 Safety - Hazardous Materials See AMS 2451. 2. APPLICABLE DOCUMENTS See AMS 2451. 3. TECHNIC
7、AL REQUIREMENTS See AMS 2451. 3.1 Procedure 3.1.1 Nickel shall be electrodeposited from a sulfamate nickel brush plating solution containing addition agents to produce the specific hardness in accordance with processing instructions from the solution manufacturer. 3.2 Properties 3.2.1 Adhesion to Sp
8、ecimens The requirements of AMS 2451 shall apply. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS 2451/7A - 2 - 3.2.2 Hardness The hardness of the deposit shall be 400 to 500 HV or equivalent
9、. 3.2.3 Stress The residual surface stress in the deposit shall be within the range of 0 to 15.0 ksi (0 to 103 MPa) compressive. 4. QUALITY ASSURANCE PROVISIONS See AMS 2451. 5. PREPARATION FOR DELIVERY See AMS 2451. 6. ACKNOWLEDGMENT See AMS 2451. 7. REJECTIONS See AMS 2451. 8. NOTES See AMS 2451.
10、8.1 Plating meeting the requirements of this specification will meet the performance requirements of AMS 2423. 8.2 Hardness conversion tables for metals are presented in ASTM E 140. 8.3 Key Words Brush plating, selective plating, sulfamate nickel, worn parts, mismachined parts, repair PREPARED BY AMS COMMITTEE “B” Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
